18. What is the independent variable and what does it represent? 19. What is the dependent variable and what does it represent? 20. Interpret the meaning of the slope of the trend line equation.

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 need help witn all questions on the papers attached.

Women's Earnings as a Percentage of Men's
Earnings
90
80
70
60
50
y = 0.617x - 1156.3
40
30
20
10
1979
1984
1989
1994
1999
2004
2009
Year
18. What is the independent variable and what does it represent?
19. What is the dependent variable and what does it represent?
20. Interpret the meaning of the slope of the trend line equation.
21. Is there a strong, moderate or no linear correlation between the dependent and independent variable?
22. Use the equation for the trend line to estimate women's earnings as a percentage of men's earnings in 2000. (Round
to the tenths place.)
23. Should we use this model to predict women's earnings as a percentage of men's earnings for 2018?
Percentage
Transcribed Image Text:Women's Earnings as a Percentage of Men's Earnings 90 80 70 60 50 y = 0.617x - 1156.3 40 30 20 10 1979 1984 1989 1994 1999 2004 2009 Year 18. What is the independent variable and what does it represent? 19. What is the dependent variable and what does it represent? 20. Interpret the meaning of the slope of the trend line equation. 21. Is there a strong, moderate or no linear correlation between the dependent and independent variable? 22. Use the equation for the trend line to estimate women's earnings as a percentage of men's earnings in 2000. (Round to the tenths place.) 23. Should we use this model to predict women's earnings as a percentage of men's earnings for 2018? Percentage
Math 123
Homework 8A – Sec 8
Quantitative Reasoning
Scatterplots and Linear Models
Questions 10-17. Use the Atmospheric Carbon Dioxide Concentration scatterplot below to answer the questions.
Atmospheric Carbon Dioxide Concentration
1970-2012
400.00
380.00
2011, 391.63
360.00
340.00
320.00
y = 1.6178x - 2864.6
300.00
1970
1975
1980
1985
1990
1995
2000
2005
2010
2015
Year
10. What is the independent variable and what does it represent?
11. What is the dependent variable and what does it represent?
12. Describe the relationship/trend between the two variables in this graph.
13. Write a sentence explaining the value of the slope for this regression line.
14. Is there a strong, moderate or no linear correlation between the dependent and independent variable?
15. Use the equation to estimate the CO2 level in 2011. (round to the tenths place)
CO2 in ppm
Transcribed Image Text:Math 123 Homework 8A – Sec 8 Quantitative Reasoning Scatterplots and Linear Models Questions 10-17. Use the Atmospheric Carbon Dioxide Concentration scatterplot below to answer the questions. Atmospheric Carbon Dioxide Concentration 1970-2012 400.00 380.00 2011, 391.63 360.00 340.00 320.00 y = 1.6178x - 2864.6 300.00 1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 Year 10. What is the independent variable and what does it represent? 11. What is the dependent variable and what does it represent? 12. Describe the relationship/trend between the two variables in this graph. 13. Write a sentence explaining the value of the slope for this regression line. 14. Is there a strong, moderate or no linear correlation between the dependent and independent variable? 15. Use the equation to estimate the CO2 level in 2011. (round to the tenths place) CO2 in ppm
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